I have generated a simple gorilla/mux API using swagger. For my single endpoint /v1/abc/{arg} I am passing an argument.

Therefore a request like: http://localhost:9090/v1/abc/hello simply echos the argument for now. The following function handles the request:

func GetAbcByArg(w http.ResponseWriter, r *http.Request) {
    w.Header().Set("Content-Type", "application/json; charset=UTF-8")
    vars := mux.Vars(r)
    arg, _ := url.QueryUnescape(vars["arg"])
    log.Printf("arg %s", arg)
    w.WriteHeader(http.StatusOK)
    fmt.Fprintf(w, "%v
", arg)
}

So far so good. However, whenever I try to pass some special characters as the argument, I get a 404 error and the handler is not called. I though I could simply escape the argument by fully escaping URL characters (rfc3986), but that is also not working. Why? How can I prepare any string so I can pass it in a single element?

Examples:

http://localhost:9090/v1/abc/hello working as expected

http://localhost:9090/v1/abc/123/xyz not working as expected

http://localhost:9090/v1/abc/a.x working as expected

http://localhost:9090/v1/abc/https://google.com not working as expected

http://localhost:9090/v1/abc/https%3A%2F%2Fgoogle.com not working, but why?

UPDATE

Route setup:

var routes = Routes{
    Route{
        "GetAbcByArg",
        strings.ToUpper("Get"),
        "/v1/abc/{arg}",
        GetAbcByArg,
    },
}

Replacing one of the / in this pages address is still pointing to this page:

https://stackoverflow.com/questions/55716545%2Furl-escaped-parameter-not-resolving-properly

So I guess

http://localhost:9090/v1/abc/https%3A%2F%2Fgoogle.com

Is seen as http://localhost:9090/v1/abc/https%3A//google.com

By your router and it doesn't seem to allow any more than one part after abc

It is working with

router := mux.NewRouter().SkipClean(true).UseEncodedPath()

ref: https://github.com/gorilla/mux/blob/master/mux.go